Valve-seat for hot-blast stoves



2 Sheets-Sheet 1.

(No Model.)

P. T. BERG.

VALVE SEAT FOR HOT BLA$T STOVES.

No. 392,179. Patented Nov. 6, 1888.

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2 Sheets-Sheet 2.

(No Model.)-

P. T. BERG.

VALVE SEAT FOR HOT BLAST .STOVES.

Patented Nov. 6 1888.

WWWWQ [wen/607 0? 1M N. warns PhoM-Lflhngmpher. Washington. mc.

FFICE.

PATENT PER TORSTEN BERG, OF BRADDOCK, PENNSYLVANIA.

VALVE-SEAT FOR HOT-BLAST STOVES.

SPECIFICATION forming part of Letters Patent No. 392,179, dated November 6, 1888.

Application filed May 24, 1886. Serial No. 208,058. (No model.)

To all whom it may concern: v

Be it known that 1, PER TORSTEN BERG, of

Braddock, in the county of Allegheny and tion thereof, reference being had to the accompanying drawings, forming part of this specication, in which' Figure 1 is a vertical section of the valveseat 011 the line zz of Fig. 2. Fig. 2 isa plan view, half of which is Viewed on the plane of the line a; :v of Fig. l, the remainder being on the plane of the line y y of the same figure. Fig. 3 is a vertical section of the valve-seat, shown in connection with the blast pipe and valve of a hot-blast stove. view of the seat, showing the adit of the water-pipes. Fig. 5 is a vertical cross-section on the line 17 o of Fig. 4.

Likesymbols of reference indicate like parts in each.

Heretofore in the construction of valveehambers for hot-blast stoves it has been customary to construct the valve-seat of an annular metal casting made in one or more parts,

which valve-seat has been built into the masonry of the valve-chamber, so that to remove the seat for repairs the masonry'must be torn out at the expense of much trouble and labor, and must be subsequently rebuilt when the valve-seat is replaced. Such construction is well illustrated in English patent to Whitwell, No. 1,797, of 1871.

An other construction of val ve-seat and valvechamber is shown in United States Patent to Long, No. 267,234, in which the valve-seat is made of an annular casting provided with upturned annular flanges on its inner and outer peripheries. This casting is set between the sections of a Valvechamber casing, and is held in place by bolts and by the flanges. It is removable only by removing the upper easing, so as to allow room for the passage of the flanges of the casting, and, as applied to the usual masonry-chamber, is removable only by tearing out the Walls, as before described.

The object of my invention is to provide means whereby a valve-seat can be so applied to a masonry valve-chamber that it can be Fig. 4 is a side easily removed and reset without tearing out the masonry. I

It consists, first, in a masonry valve-chamber wherein the upper section is faced at the bottom with metal, so as to separate it altogether from the valve-seat, which is set below it under the facing. The valve-seat is therefore not built in the masonry, but is simply set and bolted in place, so that by easing the strain and frictionvofthe upper section upon it the seat may be readily drawn out and reset without disturbing the rest of the structare. The valve-seat is directly interposed between the two sections of the valve-chamber or between the metal facings thereof, so as to completely seal and make gas-tight the joint between these sections, and the inner rim of the annular valve-seat projects interiorly within the valve-chamber, so as to form the seating for the vertically operating Valve, which is within said chamber.

It consists, second, in a valve-seat casting adapted to be set between the sections of a valvechamber, and so shaped that its thickest part shall be between the ehamber-walls that is, so that it shall have no internal flanges or thiekerportionswhich shall preventitfrom being slid out horizontally from between the sections when it is desired to remove and re place the seat. It is in this sense that I shall hereinafter use the word unflanged.

My invention further consists in certain mechanism whereby a valve-seat is removably fitted to its place.

Referring to the drawings, the valve-seat 2 is an annular casting with a hollow channel, 3, for the passage of water which flows therethrough, entering by a pipe, 4, and discharging through a pipe, 5, thus cooling the valveseat and preventing its warping or burning. Around the valve-seat casting are two out wardly-projecting bolting -flanges, 6, which are provided with a series of open boltingslots, 7.

8 8 are the walls of the blast-chamber. They are made of masonry incased in sheet-iron jackets 9 in the usual way, and are formed in two sections-an upper section and a lowersectionbetween which is the valve-seat. The ends of the sections of the chamber are faced by annular metal facings or cap-plates 10, and

riveted by rivets 11 to the opposite faces of these plates or facings are rings 12.

The valve-seat casting is set in between the rings 12, and is secured by bolts 1t, which lit in the slots 7 of the flanges 6 and in corresponding slots, 15, of the rings 12, the latter slots being countersunk, as at I), to receive the heads of the bolts. The valve 16 is then seated upon the inner edge of the valve-seat, which projects into the valve-chamber. It will be noticed that the thickest portion of the valveseat casting is that part which is between the rings 12,and that there are no internal flanges which prevent the seat from being easily drawn out of its place. The laeings 1t) and the rings 12 separate the valve-seat from the masonry. It can therefore be removed by loosening and taking out the bolts 1-l,when the whole seat may be slid out, the upper part of the valve-chamber being lirst supported in any suitable way to case the pressure on the valveseat. In like manner the valve-seat is reset by putting it between the rings 12 and readjnsting the bolts 1-1.

During the operations of removing and 1esetting the valveseat the metal faeiugs on the valve-chamber sections, particularly on the upper section, preserve the integrity of the parts.

I claim as my invention- 1. The combination, in a hot-blast stove valvechamber constructed of masonry and separated horizontally into two sections, between which is the valveseat, 01' a metal facing on the upper section and the valve-seat of an annular shape removably set between said sections and tightly sealing the joint between them, the internal periphery of the said seat projecting within the chamber, and a vertically-movable valve within the valve-chamber, which is seated on the said internally-projecting periphery of the seat, substantially as and for the purposes described.

2. The combination, in a hot-blast stove valve-chamber constructed of masonry and separated horizontally into two scctions,between which is the val.veseat,of an untlanged valveseat removably set between said sections and tightly sealing the joint between them,the internal periphery of the said seat projecting u within the chamber,and a vertically-movable valve within the chamber, which is seated 011 the said internally-projecting periphery of the scat, substantiallyas and for the purposes described.

3. The combination, with a hot-blast stove valve chamber,separated horizontally into two sections, between which is the valve-seat, of rings 12,secured to the faces ol'said sections,and a valve-seat removably interposed between the rings and tightly scaling the joint between them, and bolts connecting the seat and rings, substantially as and for the purposes described.

t. The combination, with a hot-blast stove valve-chamber made in two sections, between which is the valve-seat, of rings 12, secured to l the faces of said sections, a valve-scat casting having flanges 6 interposed between the rings, and bolts connecting the rings with the flanges, substantially as and for the purposes described.

5. The combination, with a hot-blast stove valve-chamber made in two sections, between which is the valve-seat, of caps or facings 10, covering the ends of the sections, rings 12, bolted to the exterior of the facings, and the valveseat casting interposed between the rings and bolted thereto, substantially as and for the purposes described.

In testimony whereofl have hereunto set my hand this 17th day of May, A. D. 1886.

l. TORSTEN BERG.

Witnesses:

W. B. ConwIN, JN-o. K. SMITH. 

